Calculate the total surface area of the walls for the Parlor, Lobby, and Bedroom 1, excluding windows and doors.

Here are the calculations based on the provided plan and information:

Given Dimensions:

• Height of the building (floor to ceiling) = $2.8 \text{ m}$
• Height of all windows = $1.2 \text{ m}$
• Height of all doors = $2.1 \text{ m}$

Room Dimensions from Figure 4:

• Parlor: Length = $4.00 \text{ m}$, Width = $3.00 \text{ m}$
• Lobby: Length = $2.00 \text{ m}$, Width = $1.50 \text{ m}$
• Bedroom 1: Length = $3.00 \text